A study on maize varieties and hybrids in Nigeria found that certain traits like days to flowering and ear weight have a big impact on grain yield. The researchers looked at 10 maize varieties and their 45 hybrids to see how different characteristics were connected. They discovered that traits like plant height, number of grains per ear, and ear weight were closely linked to grain yield. This means that focusing on these traits could help improve maize varieties for higher yields.